fix statistics calculation for instanced geometry

src/renderers/webgl/WebGLBufferRenderer.js

@@ -37,11 +37,23 @@ THREE.WebGLBufferRenderer = function ( _gl, extensions, _infoRender ) {
 
 		if ( position instanceof THREE.InterleavedBufferAttribute ) {
 
-			extension.drawArraysInstancedANGLE( mode, 0, position.data.count, geometry.maxInstancedCount );
+			var count = position.data.count;
+
+			extension.drawArraysInstancedANGLE( mode, 0, count, geometry.maxInstancedCount );
+
+			_infoRender.calls ++;
+			_infoRender.vertices += count * geometry.maxInstancedCount;
+			if ( mode === _gl.TRIANGLES ) _infoRender.faces += geometry.maxInstancedCount * count / 3;
 
 		} else {
 
-			extension.drawArraysInstancedANGLE( mode, 0, position.count, geometry.maxInstancedCount );
+			var count = position.count;
+
+			extension.drawArraysInstancedANGLE( mode, 0, count, geometry.maxInstancedCount );
+
+			_infoRender.calls ++;
+			_infoRender.vertices += count * geometry.maxInstancedCount;
+			if ( mode === _gl.TRIANGLES ) _infoRender.faces += geometry.maxInstancedCount * count / 3;
 
 		}
 

src/renderers/webgl/WebGLIndexedBufferRenderer.js

@@ -53,6 +53,9 @@ THREE.WebGLIndexedBufferRenderer = function ( _gl, extensions, _infoRender ) {
 
 		extension.drawElementsInstancedANGLE( mode, count, type, start * size, geometry.maxInstancedCount );
 
+		_infoRender.calls ++;
+		_infoRender.vertices += count * geometry.maxInstancedCount;
+		if ( mode === _gl.TRIANGLES ) _infoRender.faces += geometry.maxInstancedCount * count / 3;
 	}
 
 	this.setMode = setMode;